I took the 7/8/2010 MCAT and only used the ExamKrackers subject books to study. I just got my scores back today, and I think they were a great study tool. I was averaging around 12-13 on the Biology/Organic Chemistry 30-minute tests, around an 11 on the Physics/General Chemistry 30-minute tests, and around a 10 on the Verbal Reasoning 30-minute tests. My MCAT scores were BS-13, PS-11, VR-15. I don't know if this will help you any, but it's the kind of information I would have liked to know while I was studying to have some idea. Good luck!